"The knowledge and prudence of the poor themselves, are absolutely the only means by which any general and permanent improvement in their condition can be effected." - Thomas Malthus
This is what happened o Solyndra. They had a solid business plan where the production of solar panels were based on X amount of watts created per x amount of dollars. China flooded the market with solar panels that were predominantly garbage but it drove the price per watt down way below Solyndra's business plan which not only killed them but really set back the sector hard as their trash solar panels then were predominantly flawed but the economic damage had been done.
But back to your point, we shouldn't cheat like china does with dumping and that ****ing currency manipulation they've been illegally doing forever but tariff their goods at least until they stop cheating with these methods. We looked the other way and went free trade and along with cheating, China went protectionism and their economy exploded.
So if their business plan was designed that a raw material would always remain exorbitantly high and relied on that to hold on firm to market share, it was not a good business plan at all.
If a country does change to lower the tariff of their goods exported to us... so be it. Not our goal.